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| Subject | English | Czech |
| nucl.phys., nucl.pow. | fast neutron reactor | rychlý reaktor |
| nucl.phys., nucl.pow. | fast neutron reactor | reaktor s rychlými neutrony |
| nucl.phys., nucl.pow. | fast reactor | rychlý reaktor |
| nucl.phys., nucl.pow. | fast reactor | reaktor s rychlými neutrony |
| environ. | fast reactor Nuclear reactor which produces more fissile material than it consumes, using fast-moving neutrons and making plutonium-239 from uranium-238, thereby increasing the reactor's efficiency | reaktor rychlý |